Oscillating meter



(No Model.) 3 Sheets-Sheet l.

L. H. NASH.

OSOILLATING METER.

No. 300,627. Patented June 17, 1884.

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(No Model.) 3 Sheets-Sheet 2.

L. H. NASH.

OSOILLATING METER.

No. 300,627. Patented June 17, 1884.

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a? 6% 4 M i (No'ModeL) 3 Sheets-Sheet 3.

L. H. NASH.

OSGILLATING METER.

N0.-300,627. Patented June 17, 1884.

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LEVIS HALLOOK NASH, OF BROOKLYN, ASSIGNOR TO THE NATIONA METER COMPANY,NEW YORK, N. Y.

OSCILLATING METER.

SPECIFICATION forming part of Letters Patent No. 300,627, dated June 17,1884.

Application filed December 18, 1883. (No model.) I

To all whom it may concern..-

Be itknown that I, Lnwrs HALLOOK NASH a citizen of the United States,residing at.

Brooklyn, in the county of Kings and State of 'New York, have inventednew and useful Improvements in Rotary Water-Meters, of which thefollowing is a specification.

Steam-engines have been constructed upon the plan of aneccentrically-moving piston, adapted to rock upon a radial abutmentwithin an inclosing-case to'divide said caseinto receiving anddischarging spaces, the center of the piston describing a circle aroundthe center of the case. A piston adapted to have such a movement I usein my improved water-meter; and the objects of my improvement are tosimplify the construction and perfect the operation of themeter, toeffect accuracy of measurement of the water, and to producea meter andforming a joint within the piston in every position of the latter, whilesaid piston forms a joint with the case, and suitable means forregistering the movements of the piston; and I do not claim herein,broadly, such a thing, nor any combination of devices or matter shownand described in my said application.

The specific matter of improvement herein consists in a novel means forcontrolling the eccentric movements of the piston in connection with acase-dividing abutment, dividing also the interior of the piston,whereby to effeet a division of the inclosingcase and of the interior ofthe piston into receiving and discharging spaces for the water.

My improvement also embraces matters of construction and ofcombinations, which will be made the subject of specific claims.

Referring to the accompanying drawings, Figure 1 represents a verticalcentral section of a water-meter embracing my improvements; Fig. 2, ahorizontal section of the same, taken on theline mm of Fig. 1; Fig. 3, asimilar section showing a modification; Fig. 4, a vertical sectionshowing another modification, and Fig. 5 a horizontal section of thesame.

The cylinder or case A has one head cast with it, while the other oneisremovable, and at one side an enlargement or extension chamber formingthe inlet or outletpassages I and 0. These passages communicate by abranch passage leading to each end ofthe cylinder, and by means of theinlet-ports I I and outlet-ports O 0", located in the cylinder-headswith theinterior of the cylinder. The abutment A extends radially intothe piston from one cylinder-head to the other, and terminates in anenlargement within the open piston to form a joint therewith, while theeccentrically-moving piston forms a joint with the case. The piston B isopen from one end to the other, and has at one side a longitudinal slot,f, which bears with its sides against the opposite sides of the abutmentand forms a guide and water-joint upon it. The piston is 0011- trolledin its eccentric movements by an elliptical or oval recess or groove, hh, on each end thereof, and pins H H secured in the heads of thecylinder, and by them the piston is guided. The oval recesses are madeslightly tapering in cross-section, and the pins H", of correspondingshape, fit snugly into them, so that they can be tightened to take upthe wear in the grooves of the piston. One of these pins, H is hollow,and receives a spindle having at its inner end a crank or arm, 6, whichbears upon the side of the wall of the oval recess has the piston moves.On the outer end of said spindle is secured a pinion, b, which mesheswith a gear-wheel, a, on the shaft d. This shaft is journaled with oneend in the cylinder-head,whileits other end is supported in astuffing-box, c, on an auxiliary head or plate, D, which forms,with thehead 0, a chamberin which the gearing a b is placed 5 -IOO maintainedduring the entire movements of I require a change in the form of thepiston and v the piston, or at intervals in its movements,

while the contact of the piston with the cylinder must be constant. Thedividing joint within the piston is formed by a cylindrical enlargement,g, of the radial abutment, and a central circular wall, i, adapted toform the joint during the return movement of the piston, as shown inFig. 2, while in Fig. 3 the interior of the piston has twooppositely-projecting points, i, and the abutment has twobearing-points, 9, adapted to make contact with the interior wall of thepiston from one projecting point to the other during the entire movementof the piston, in which movement one of the bearing-points of theabutment always has such contact with the piston.

In Figs. 1 and 2 I have shown the means for controlling the eccentricmovements of the open piston as connecting therewith out of center withthe case, and consisting of an oval groove 0r recess or projection, F,which may be formed in one or both ends of the piston to receive thecontrolling action of pins fixed in the head or heads of the case. InFigs. 4 and 5 I have shown modifications of this controlling device, inwhich the fixed case-pins are placed in another position eccentric tothe center of the case, and the oval bearing of the piston changed inposition to co-operate with the pins precisely as in Fig. 2. In Fig. 4the core of the oval recess in Fig. 2 is supported by arms extendingfrom the inner wall of the piston,within its interior opening, inposition to allow the crank-arm e of the pin H to be driven by contactwith the oval core, as in Fig. 2. I may use such a controlling device oneach side of the radial abutment, but one will give efi'ectivecontrolling action; and the case pins may be arranged in the top or inthe bottom head, the relative positions of the pins and of the ovalcores being such as to maintain the joint forming contact of the pistonwith the case, while the conformation of the interior wall of the pistonand the form of the enlargement of the radial abutment are such as tomaintain a dividing-j oint within the interior of the piston at certainportions only of its eccentric movements. The path of thepiston-controlling device is of a form adapted to maintain a cylindricalform of piston in contact with a cylindrical form of case; but a changein the form of the piston-controlling device would of the case, or ofboth.

The operation is as follows: The water enters through the inlet passageI X and passes through the branch passages to the inlet-ports I Ifland,pressing against the external surface of the piston B,forces it in thedirection of the arrow, the water on the opposite side of the pistonmeanwhile passing out through the ports 0' O to the passage X 0. Theinlet and the outlet ports are increased in their capacity by-thepassages X X, formed in the wall of the case on each side of theabutment, and these passages communicate with the chamber of the case oneach side of the abutment. When the piston takes the position shown bythe dotted lines in Fig. 2,the water enters within the center of thepiston, driving it in the same direction. At this position of the pistonshown by dotted lines the abutment divides the interior of the pistoninto a receiving and discharging space, and consequently as the waterenters the piston on one side of the abutment it is being dischargedfrom the other, returning the piston to its former position.

I claim 1. The combination, in a water-meter, of an inclosing-casehaving suitable inlet and outlet ports, an abutment, and one or morepins eccentrically placed in said case-heads,with aneccentrically-moving piston having a side slot and a projection out ofits center, of a form adapted, in connection with the fixed pin, tocontrol the motion ofthe piston, and suitable registering mechanism,substantially as described.

2. The combination, in a water-meter, of a piston having an oval grooveor projection out of center in one or both of its ends, andalongitudinal side slot,with an inclosing-case having one or more pins,H H, placed out of center of said case, a shaft passing through one ofsaid pins, having a crank-arm, a 'dividingabutment, and suitableregistering mechanism, substantially as described.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing wit- DGSSGS.

' LEWIS HALLOCK NASH.

Witnesses:

A. E. H. J OHNSON. J. W. HAMILTON JOHNSON.

